I religiously used Dhathri for 8 months. It worked to perhaps some extent because of the care I took. This effect was negligible. I can say this with certainity because after 8 months , I used olive oil and the effect was the same. I continue using olive oil.
Do not expect any miracle from Dhathri Hair Care. If you are hell bent on spending on ayurvedic product, may be you should try the lesser commercialised version sold by kotakkal Arya vaidya shala. Atleast, the dandruff and premature greying will stop within 3 months. With Dhathri , you can not have any such expectation.
Also, dhatri doesnt solve the problem of split ends. The oil being costly, the concentration is on the scalp. Over, the time, you will see split ends all over .
I suggest eating healthy and avoid buying products like this. Buying Dhatri is a disinvestment.